Printed electronics is revolutionizing medicine. LOPEC, the International Exhibition and Conference for the Printed Electronics Industry in Munich, Germany, will present new developments from this area from March 24 to 26, 2020. A conversation with LOPEC plenary speaker John A. Rogers, professor at Northwestern University (Evanston, IL), about monitoring systems and other flexible electronic devices that can be worn directly on the skin or implanted inside the body. Prof. Rogers, you studied chemistry and physics, you could also be called a materials scientist, perhaps even an electrical engineer. What led you to printed electronics? Rogers: As a postdoc at Harvard, I became engaged in research around chemical and materials oriented approaches to nanofabrication, of relevance mainly to the microelectronics industry but also to the emerging field of printed electronics back in the 1990s. I then spent some time at Bell Laboratories where we developed programs based on adapting some o